{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "Ras - dva was identified as a gene regulated by anterior neural fold protein - 1 / homeobox expressed in embryonic stem cells - 1 , a transcription factor known to be critical in pituitary development , and has an expression profile in the chicken embryonic pituitary gland that is consistent with in vivo regulation by glucocorticoids ."}
{"Chemical": []}